Carbureter.



W. C. CARTER.

CABBURETEB.

APPLICATION FILED we. a1, 1908.

Patented June 14,1910.

2 SHEETB-BKBBT 1.

,a inventor: Wllham 0.6arhar bY/iutaw w Ahh'YB.

Witnesses W. G. CARTER.

CABBUBETEB. v

nrucuml mum we. a1, 1908.

961,481 Patented June 14,1910.

Witnesses Q m v bym fli Aim.

j UNITED sm es i gnnir OFFICE.

WILLIAM C. CARTER. OF ST. LOUIS. MISSOURI.

CARBUBETER.

Specification of Letters Patent.

Application filed August 31, 1908.

To all whom it may concern..-

Be it known that I, W'ILL'IAM C. CARTER, a citizen of the United States,residing at St. Louis. Missouri, have invented a certain new and usefulImprovement in Carburetors;

of which the following is a full, clear, and exact description, such aswill enable others skilled in the art to which it appertains to make anduse the same, reference being had I .0 to the accompanying drawings,forming grade of fuel to be used.

Another object is to provide a carbureter which is so constructed thatvery little suction is required to draw the charge into the cylinders ofthe engine, thereby producing 35 n are power and a higher-rate of speedthan the carburetors heretoforein use;

Another object is to provide a carbureter that does not have to be adusted or set for high speeds and low speeds, the calbnreter being soconstructed that the supply of fuel varies automatically as the speed ofthe engine varies.

Another object is to provide a carburetor having novel means forregulating the auxiliary air valve of the mixing chamber, said meansbeing adapted to be controlled by an operator located some. distancefrom the carbureter as, for example, by a person sitting in the drivingseatof the automobile on which the carburetor is used. And still anotherobject of my invention is to provide a carbureter having a mixingchamber which is so constructed that the air which enters same will bethoroughly mixed with vaporized fuel and thus produce a charge ofvertical sectional view of the mixing chaml the proper richness for eachcylinder of the engine.

Other objects and desirable features of my invention will be hereinafterpointed out.

Figure 1 is a front elevational view of a carbureter constructed inaccordance with my invention; Fig.2 [5 a side elevstional view of saidcabureter, the mixing chamber being shown in vertical section; llg. 3 isa Patented June 14, 1910. Serial No. 451.017.

bcr, float chamber, jet tube and the mem. bers inside of which said jetlube l. ar-

ranged; Fig. 4 is a perspective view-o! the auxiliary air valve for themixing chamber l4 ig. 5'13 :1 vertical sectional view of thimix' ingchamber, said view being taken up noximately on the line 5-5 of Fig. andFig.

G is an enlarged horizontal sectional viewtaken approximately on theline (L-B of,

Fig.

Referring to the drawin 's which illus, trate the preferred TOIm oi myinvention, 1 desi nates an approximately cup-shaped hollow lmember thatforms a that chamber,

and 2 designates a tubular-shaped portion on one side of said memberthat forms what I will term a starting reser oir. This tubular-shapedportion 2 is preferably formed integral wlth the member 1, and a duct 3leads from the lower end of said tubular-' shaped portion to theinterior of the on shaped member 1 so as to permit the liquid fuel inthe float chamber to flow intothe starting reservoir or,rather, into thejet tube that communicates with said duct, as hereinafter more clearlydescribed. A removable tep F is detachably connected to the cup-shapcdmember 1 by means of fas-- tening devices 8', and, if desired. thebottom of said member 1 can be provided with a removable plug or stopper1, as shown in Fig. 3, so as to enable the float chamber to be drainedout when sediment collects therein. i

A float which-preferablv consists of? hollow metal ball, is locatedinside of the float chamber for automatically actuating a lever 4? whichcontrols a valve 4* that admits the liquid fuel into the float chamber,said float 4 operating to always kee the Iuel in the float chamber at acertain evel. I have herein shown a ball valve 4 for controlling thesupplv of liquid fuel to the float chamber but I wish it to beunderstood that it is immaterial so far as my broad idea is concerned,whattype of valve is used for this purpose. The liquid fuel is conductedinto the float chamber by means of a pipe 5 leading from a fuel tank,not shown, and. communicating with a hollow portion 5 formed in the top8 of the float chamber, the fuel flowing from. the hollow portion 5"into the float chamber through an openingm'hich the ball valve 4 closes,as shown in Fig. 3.

A mixing chamber 6 providedwith a flange or other suitable device forconnect ing it to the intullc pipe. A leading to the cylinders oi" theengine on which the rurliu- I reter used, is located above the limitchamber, and in the construction hen-in shown said mixing ell-umberconsists ot u corcd-out-casti' Llmt: is connected to the vided with anintegral sleeve 1? that forms 5 jet tube -81'VO11',

a continuation of the tulnilurshaped portion on the member 1, and a ductor con 1 air pipe 11. .More power and a higher rate dull 7 that isformed in Silltl top in 3,. establishes comuuun-c: ttion l30- tween themixing chamber and the tarting reservoir so as to permit the contents ofsaid starting reservoir to be drawn up into the mixing chumber hen asuction is created in the cylinders of the engine.

A vertically disposed tube 9 which 1 term it jet tube communicates Withthe duct 3 so that the engine will operate at a higher which leads fromthe float chamber into the lower end of the starting reservoir so thatthe liquid fuel can llow from the float cluirnher into said tube andthence escape interally therefrom through small perforations or holes 0formed in said tube and located in diil'erentlevels or in differenthorizon 1i planes. The upper end of the jet tube 1 closed by u nut 15,hereinu fter described, so that when the air is druwn out. of said tubea partial vacuum will 'necreated therein which causes the liquid fuel torise in suid tube. An air pipe 11, which surrounds the 9 and projectsinto the starting res- I'crms a conduit or passageway through which airis drawn into the mixing chamber by the suction in the cylinders ofthengine, the upper end of said air pipe being open or constructed insuch it manner that air can rush dmvruxardly through same so as tocreate a partial vacuum in the jet tube and also vaporize the liquidfuel that emerges from the jet tube. The lower end of this air pipe .11terminates above the bottom of the starting reservoir, us shown in Fig.3, so as to permit the vaporized fuel to )ass 11 iwurdlv around saul "u)9 to the duct a and then into the mixing chamber ti. The

' air rushing down through this :iir pipe 11 creates a partial vacuum inthe jet tube which causes the liquid fuel to rise nutonuiticall v insaid tube and escape through the perforations 10 therein in the form ofa spray or a number of fine jets of liquid fuel that are vaporized orconverted into gas as soon as they become mixed with the air which issucked into the mixing' chamber. As the suction in the cylinders of theengine increases the vacuum in the jet tube will, of

, course, increase proportionutely and thus cause the fuel to risehigher in the jet tube and bring more of the ports 10 into service;

or, in ther words, more jets of fuel will emerge from the jet tube asthe suction in the mixing tiuuuber increase. Consequently. the supply offuel which is drawn into the mixing cluunher will vurj' uutonuiticullyus the speed of the engine varies =r the suction from the cylinderscontrols 'hi ol' the liquid fuel in the jet tube. painting or splittingthe liquid fuel in the manner above described 1 am able to a low gradeof fuel for the fuel is did into such minute particles that it vap-0117.05 quickly when it, comes in contact with the air that rushes downthrough the speed and generate more power than if several pounds ofsuction were required to draw in the charge. It will be noted that fireair which vaporizes the liquid fuel euters the upper end of theair pi 1iand then passes out of the lower end 0 said pipe after it has vaporizedthe jets of fuel that emerge from the jet tube.

The ob ect of having the air travel in an opposite direction to that inwhich the liq-f uid l'uel travels as it rises in the jet tube is toprevent the supply of fuel that leaves the jet tube from becoming sogreat. that too rich a mixture will be produced. For example, if the airentered the lower end of the air pipe 11 and then passed upwardlythrough said pipe and out the upper end thereof to the mixing chamberthejets of fuel that emerge from the lower ports in the jet tube wouldbe converted into a gas which would tend to obstruct or close/the airpipe from the supply of fresh air. Consequently, the quantity of liquidfuel that emerged from the jet tube would be so much greater than thequantity of air that passed: up through the air pigs that the supiply ofair would not be su icient to pro uce a proper mixture," Inmy mprovedconstruction this cannot occurtor the supphrof fresh air is always abovethe level 0 the fuel in the jet tube so that it will be im 05- sible forthe air pipe to become choke or filled with pure gas. The result is thatthe proper amount of air will always be supplied and thus produce acharge of a proper richness The perforations 10 in the jet tube arepreferably arranged spirally or out of vertical alinement with eachother so that each jet of fuel will become mixed with a ditl'erentparticle of air, the jets of fuel emerging from the jet tube indifferent horizontal planes and also different vertical planes so thatthe jet which emerges from one perforation will not mix with the airthat has become mixed with the jet directly above it.

As shown in Fig. 3, the perforations or holes 10 in the jet tube are sosmall and are so close together that the supply of fuel increasesgradually so that no perceptible 10 change is noticed in the explosionsas the speed of the engine increases. e

The lowest perforation 10 in the jet tube is below the normal level ofthe fuel in the float chamber so that when the engine stops some of thefuel jn-the lower end of the jet tube will flow through the lowestperforation therein into the starting reservoir. The quantity of liquidfuel that collects in the bottom of the starting reservoir is justsulficientto produce a starting charge for the cylinder of the engine,and when the engine is cranked a suction will be created in the mixingchamber which causes the fresh air to rush down through the air pi e 11and aporize the fuel in the bottom 0 the starting reservoir, saidvaporized fuel being then drawn up around the outside of the air pipeand through the duct 7 into the mixing chamber from which it asses intothe cylinders of the engine. 5 the engine continues in operation asteady current of air will be drawn down through theair pipe and thusvaporizes the jets of fuel that emerge from the jet tube, the air thatis drawn down through said air pipe being sufiicieut to produce a chargeof the proper richness up to a certain s eed of the engine. When theengine excee s this speed and a greater suction is thus created in themixing chamher the liquid fuel that escapes from the jet tube willexceed the quantity of air that passes down through the air ipe, andconsequently, the charge that is rawn into the mixing chamber will betoo rich to form an explosive gas. To compensate for this, or to cutdown this very rich charge of vaporized fuel, I have provided the mixingchamber with an auxiliary air valve, hereinafter described,,that opensautomatically when a certain suction is obtained so as to admit asufficient quantity of-fresh air to produce a charge of the properIlCllllcSS.

I prefer to arrange the air pipe 11 inside of a hot water chamber so asto heat said pipe and also the jet tube and thus raise the specificgravity of the fuel and cause it to vaporize quicklv. In theconstruction herein shown, said hot water chamber is formed by acomparatively large tube 14 thatcsurrounds the air pipe 11, the upperend of said tube 14 being closed by a plug or member 12 provided with anumber of radially disposed holes or openings 13 that form air portswhich permit air to enter the upper end of the air pipe 11, said pipebeing connected to the member 12 below the radially disposed holestherein. The closure for the upper end of the jet tube 9 consists of aplug or nut 15 screwed into the member 152, as shown in Fig. 3, andprovided with a tapered recess or socket that receives the beveled upperend of the jet tube. The lower end of said jet tube is also beveled sothat it will fit snugly in a tapered socket in the bottom of thestarting reservoir 2. By screwing the plug 15 downwardly the jet tubewill be forced snugly into its tapered seats or recesses and thussecurely clamped in position. This forms a very efiicientand simplemeans for 89 retaining the jet tube in position and it enables said tubeto be removed easily and it also eliminates the possibility of breakagesuch as would be apt to occur if the jet tube had a screw-threadedconnection with 35 members that support it and maintain it in position.It is immaterial, however, so far as my broad idea is concerned, how thejet tube is retained in position so that I do not wish it to beunderstood that my invention 90 islimited to this exact construction.

The large tube 14 that forms the water chamber, is connected to thesleeve 17 on the top 80f the cup-shaped member 1 by means of a nut 16through which the air 5 pipe passes, said nut filling the space betweenthe'exterior of the air pipe and the interior of the tube 14 so-as toclose the lower end of said tube. Thewater that is supplied to said tube14 is preferably ob- 103 tamed from the water jackets on the cylindersof the engine on which the carburetor is used, the upper end of the tube14 communicating with-a pipe 18 and the lower end of said tubecommunicating with a pipe 105 19 so that the water in the cylinderjackets can circulate through the tube 14. Said pipes 18 and 19 areconnected to ni'iples that are screwed into bands 18 and 19 whichsurround the tube 14 or, if desired, said nipples can be tap ed directlyinto the tube 14 if the material from which said tube is formed is thickenough to be provided with screw-threaded openings.

\Vhile vI have herein stated that the hot 5 water chamber consist of atube 14 that is detachably connected ti the top 8 of the cupshapedmember 1, it will, of course, be obvious that the member 14 can be castintegral with said top 8 and also provided at its up- 129 per cnd withan integral portion 12 for receiving'the clamping nut 15. Means of thecharacter above described for-heatin the air before it is drawn into themixing c amher is a very desirable feature but I do not wish it to beunderstood that it is an essential feature of my carbureter for thecarbureter' will operate satisfactorily without this hot water chamber.

A throttle valve 20 is arranged in the out- 130 let opening of themixing chamber, and the stem of said valve is provided with an arm 20.as shown in F ig. :2, to which a link 20 is connected for actuating saidvalve. A flange 21, which is preferably formed into al with the castingthat constitutes the mixing chaml'rer, surrounds the outlet opening 20and depends downwardly therefrom, as shown in Figs. 3 and 5, so as topr'wcnt the air that is drawn into the mixing (.llkllllher from rushingthrough the outlet opening before said air has become thoroughly mixedwith the vaporized fuel that enters the mixing chamber through theconduit 1'. By constructing, the mixing rhzunber in this manner: namely,by providing it with a depending flange that sur-mnds the outletopening. the air will be drawn uniformly from all points of the mixin:chamber and thus produce a charge of the proper richness for eachcylinder of the. engine, said flange- 21 acting as a hafllc topreventthe air from passing through the outlet opening of the mixingchamber before it has become thoroughly mixed with the vaporized fuel.

As previously stated, the mixing chmu'oer is provided with an auxiliaryair valve which opens automatically when the enginc attains a certainspeed. This auxiliary air valve is designated by the rcfercnrc characer22 and is shown clea r1 in Figs. 1. :2 and 4 of the drawings. Said valve22 is carried by an arm 23 pivotally mounted on a stud shaft 23 that iscarried by a stationary arm 24 which is preferably formed integral withthe face plate 25 of the mixing chamber. The air valve .22 is seated orheld in its closed position by means of a pring 3'12 connected at oneend to the arm :3. which carries said valve. and having its opposite endconnected to an adjustable arm 31 which is controlled by the operatorwho is stationed some distance from the carhurztrr. as, for example, theperson who is driving the-automobile on which the carbnrcteris 'used.This arm 31 is connected to a rock shaft 29 jonrnaled in'a bearing 30 onthe face plate 25 of the mixing chamber, and said rock shaft is providedwith an arm 31' to which a link 38 is connected, as shown in Fig. 2,

so that the operator can move the shaft '29 and thus vary the tensionwhich the spring 32 exerts on the opening movement of the auxiliaryairvalve 22. Instead of having the spring 32 connected directly to the arm31 I prefer to provide an adjustable connection between'said spring andarm. In the construction herein shown said adjustable connectionconsists of a shaft 33 journaled in the upper end of the arm 31 andprovided with'an arm 34 that cooperates with a rack bar 35 on the arm31. a coiled expansion spring 36 being interposed between a shoulder onthe shaft: 33 and the bearing on the arm 3 on which said shaftis mountedso as to hold the handle at in mesh with the rack bar The upper end ofthe spring 32 eccentrically connected to the shaft 33, or in otherwords, the upper end of the sprmp 32 is connected at one side of the.longitudina enter of said shaft so of the spring 3:2 is controlled bythe link 38 connected to the arm 37 of the rock shaft 29.

prevent the 1 valve from opening too quickly I have pru Med said valvewith a piston 27, as shown in Fig. '2, that opcrates in-a dash-pot 26 atone side of the mix ing chamber 6, said piston 27 being pivotallyconnected to the air valve by means of a link 28. The auxiliary airvalve 22 is so adjnstcd'that it will open automatically when thevaporized fuel that emerges from the jet tubeextends a certain amount,as previously stated. and when the quantity of fuel that emerges fromsaid jet tube increases the air valve 22 will open farther and thusadmit proportionately the same amount of air to the mixing clnunher,said valve closing automatically when the fuel in the jet tube falls orseeks a lower level. If the operator finds thatthe air admitted to themixing chm her is not sufficient to produce a charge of the properrichness. or if he finds that too much air is being admitted to themixing chamber, he moves the link 38 o as to change the position of therock arm 31 and thus vary the tension which the spring32 exerts on theopening movement ofthe air valve.

When the air valve is closed the rock arm 3.1 normally occupies such 'aposition that the spring 32 is arranged at an angle of a proximately 45relatively to the straig t portion of the arm that carries the airvalve. \Vhen' said rock arm 31 is moved to the left, looking at Fig. 4,the spring 32 will be arranged more nearly parallel to thestraightportion of the valve-mrrying arm and consequently said springwill not exert as much tension (m -the valve when it opens, therebypermitting the valve to open farther and thus admit more air to themixing chain her than when the rock nrm'is arranged in its normalposition. hen the rock arm 31 is moved to the right, looking at Fig. 4,the spring 32 will be arranged at a greater angle relatively to thestraight portion of the valve-carrying arm or more nearly at rightangles to said straightportion so that greater tension will be exertedon the valve when it opens.

To state it in another way, the spring 32 exerts a. certain tension onthe opening movement of the air valve when the rock arm is in its normalposition, as shown in Fig. 4, so that a certain suction in the mix- 1ng'chamber' will cause the air valve to open a. certain distance. If theoperator finds that the air valve does not open far enough. when the arm31 is in this position, to admit suflicicntair to produce a charge ofthe proper richness, he moves the arm 31 to the left so as to reduce thetension which the s ring 32 xerts on the opening movement 0 the airvalve. This, of course, will permit the valve to open farther before thenormal tension on the same is again established, and, consequently, agreater quantity of air can enter the mixing chamber. If the operatorfinds that toomuch air is being admitted to the mixing chamber he movesthe arm 81 to the right so as to increase the tension which the spring32 exerts on the valve and thus prevent said valve from opening as faras it did when the spring was arranged more nearly parallel to thestraight portion of the valvecarrying arm From the foregoing it will beseen that the operator can accurately overn the quantity of air that isadmitted to the mixing chamber when the motor is running for themovement of the rock arm 31 varies the tension which the spring exertson the air valve.

\Vhile I have specifically described one form of mechanism forcontrolling and ad justing the auxiliary air valve it will, of course,be obvious that various other means could be employed for this purposeand therefore I do not wish it to be understood that my invention islimited to the construction herein shown for adjusting the air valve.

Having described the details of construction of my improved carbureter,I will now describe the operation of same.

When the engine stops some of'the fuel in the float chamber will flowthrough the lowermost portof the jet tube into the starting reservoir 2and thus be in position to be drawn into the mixing chamber when theengine is cranked. The suction produced in the mixing chamber bycranking the engine causes a current of air to pass downwardly throughthe air pipe 11 and thus vaporize the liquid fuel from the bottom of thestarting reservoir and carry it into the mixing chamber. As the enginecontinues in operation a steady current of air will be drawn downthrough the air pipe ll, thus creating a partial vacuum in the jet tubewhich causes the fuel to rise in said tube and pass through theperforations 10 therein, the level of the fuel in said jet tube varyingas the suction in the mixing chamber varies. The jets of fuel thatemerge from the jet tube are vaporized and carried into the mixingchamber ,by the current of airthat passes downwardly through the airpipe, and as said air pipe and jet tube are heated by the water thatcirculates through the tubular-shaped member 14 in which the air pipe isarranged, the liquid fuel in the jet tube and also the air that passesthrough said pipe will be heated and thus cause the fuel tovaporize'quickly.

The air that is drawn down through the air pipe 11 is suilicient toproduce a charge of the proper richness up to a certain speed of theengine but when the engine exceeds this speed the fuel that escapes fromthe jet tube will be so much greater than the quantity of air thatpasses through the air pipe that the mixture will be too rich to formexplosive gas. The air that is admitted to the mixing chamber throughthe auxiliary valve 22, however, cuts'down this very rich charge and.thus produces a charge of the proper richness. The auxiliary air valve22. is so adjusted that'itopens automatically when the vaporized fuelthat emerges from the jet tube exceeds acertain amount, and as mequantity of fuel that escapes from said tube increases the valve 22opens farther and thus admits proportionately the same amount of air tothe mixing chamber.

It is well-known that in cold weather air is lighter and quicker in itsaction than in warm weather when the air is heavy and sluggish.Consequently, a greater quantity of air will flow through an opening ofa certain size in cold weather than in hot weather. With my improvedcarbureter it is a very simple matter to adjust the air valve when theweather varies for all that the operator has to do is to move the 38until the tension on the air 'valve is just right to permitsaid valve toadmit the proper amount of air to the mixing chamber.

Having thus described my invention, what I claim as new and desire tosecure by Let-' ters Patent is:

1. A carbureter provided with a jet tube having its upper end closed andits lower end communicating with asu ply of liquid fuel, said tube beingrovid e intermediate its ends with a number of open eduction portslocated at difi'erent levels, and means for causing a current; of air topass downwardly ad acentsaid tube so as to create a partial vacuumtherein and thus cause the fuel to rise automatically in said tube andpass laterally through the ports therein, the quantity of fuel thatemerges from said et tube varying automatically.

2. A carbureter having a jet tube that is provided intermediate its endswith a plurality of eduetion ports that are always open and which arelocated. at different levels, means for supplying liquid fuel to thelower end of said jet tube, and means for causing air to-pass downwardlyaround said tube and thus va orize the fuel thatriscs in said tube anemerges from the ports therein when a suction is created in the mixing;chamber of the carhuretcr. the level of the fuel in said tube var ingautomati ally as the suction in the mix" chamber varies.

3. A carburetor comprising a vertically and a mixing chambercmnmumcating with the lower end of said niembcr so that air will bedrawn downwardly through said member when a suction is created in themixing chamber, the airthat is drawn down through said member causing.the fuel to rise automatically in the. jet tube and escape through theports therein and thus be vaporized by said air.

"4. A carbureter comprising a mixing chamber, a float chamber adapted tocontain liquid fuel. a jet. tube communicating with said float chamberand having its upper end closed, said -tube being provided with aplurality of eduction ports located at diil'erent levels that permit thefuel in said tube to escape laterally in the form of a fine spray orplurality of jets, and a member surrounding said jet tube to form an airassageway, the lower end of said member lieing in communication with themixint, chamber and the upper end of said member being so constructedthat air can enter same and travel downwardly into the. mixing chamberwhen a suction is treated in said mixing chamber, said downwardlyrushing 'air causing a partial vacuum to be cr ated 1n the et tube andthus causing the. liquid. fuel to rise and fall in said tube as the sactionin the mixing chamber varies.

5. A carburetor comprising a mixing chamber, a float chamber, avertically disposed jet tube having its upper end closed and its lowerend communicating with the float; chamber so as to receive fueltherefrom, said tube being, provided intermediate its ends \vitha numberof fine perforations located at different levels, and an approximatelytubular-shaped ineinlwr surrouudinq said jet tube and having its upperend open to the atmosphere, the lower end of said member communicatingwith the mixing: chamber so that. air will flow downwardly around thejet tube when a suction is created in the mixing chamber and thus acutea partial vacuum in the jet tube which causes K -the fuel to risetherein and escape through 5 said perforations.

6.-A carburetor comprising a mixing chamher, a vertically disposed tubehaving its upper end closed. means for supplying liquid fuel to thelower end of said tube, said tube being so constructed that the fueltherein can escape latcrall at dilicrent levels intermediate the ends ofthe tube, means for causing air to pass downwardly around said tube whena suction is created in the mixing chamber so as to vaporize the fuelthat emerges from the tube and also create a partial vacuum in the upperportion of the tube which causes the level of the fuel in said tube tovary, and separate means for supplying air to the mixing chamber.

7. A carbureter provided with a vertically disposed jet tube having aplurality of eduction ports located in dilt'erent. horizontal planes andbeing always open, the upper end of said jet tube being closed, a minim,chamber, an air pipe located outside of the mixing chamber andsurrounding said jet tube, the lower end of said air pipe communicatingwith the mixing chamber so that.- air will be drawn down through saidpipe when a suction is created in the mixing chamber and thus create apartial vacuum in the jet tube which causes the level of the fueltherein to vary, and an automatic valve for admitting air into themixing chamber when the suction in said mixing chamber reaches a certaindegree.

8. A carburetor provided with a member that formsa float chamber, avalve for admitting liquid fuel into said float chamber, a float in saidmember for controlling said valve, a jet tube communicating with thefloat chamber for receiving the fuel therein and being provided with aplurality of ports located at different levels so that the. supply offuel which emerges from the jet tube will vary as the level of the fuelin said tube changes, a mixing chaml'icr, and means for causing air totravel downwardly around the exterior of said tube to mix with the fuelthat emerges from the jet tube and then pass into the mixing chamberwhen a suction is created in said mixihg chamber.

9. Acarburcter couprising a mixing chamber, a float chamber. a fl at forcontrolling the valve that admits fuel into said that.

chamber. a vertically disposed tube comnmuicatin; with the float chamberand provhlcd with a number of fine eduction ports located at differentlevels thut'pcrmit the fuel therein to escape in the form of a finespray, and an air pipe surrounding the jet communicating with theatmosphere, a mix- I at different levels as the level of the fuelvaries.

that forms a st.;rtin reservoir, said ortion -shaped portion, avertically disposed jet i 10. carbureter provided with a verticallydisposed air pipe having its upper end chamber communicating with thelower of Said pipe so as to draw air down through same when a suction iscreated in said mixing chamber, a jet tube arranged inside of said airpipe and provided intermediate its ends with a lurality of eductionports located atdi erent levels, and means for supplying liquid fuel tothe lower end of said et tube, the upper end of said tube being closedso that a partial vacuum will be created therein by the air rushing downthe air pipe and thus causing the liquid fuel to rise'in the jet tubeand esca e laterally through the eduction ports therein 11. A carbureterprovided 'with an approximately tubular-shaped member that ornis a waterchamber, means for conduct ing water into and out of said chamber, anair pipe extending through said member and having its lower endcommunicating with the mixin chamber of the carbureter and its u pere115 communicating with the atmosp ere so that air will be drawn downthrough same when a'suction is created in the mixing chamber, and avertically disposed jet tube arranged inside of said air pipe andcommunicating with a sup 1y of liquid fuel, said tube being provide withports located at different levels so that the fuel which emergestherefrom will vary as the suction in the mixing chamber varies. 12. Acarbureter provided with an approximately cup-shaped member that forms afloat chamber, an approximately tubularshaped portion on one side ofsaid member having its lower ent closed, a duct eading from the floatchamber into said tubular tube communicatin with said duct and providedwith a plurality c1 ports that perm t fuel to escape therefrom into saidstarting reservoir, some of said port-s being lower than the normallevel of the fuel in the float chamber, removable top for said cupshapedmember, a mixing chamber carried by said top, an approximately tub'ularishaped member carried by said top to form a water chamber, and an airpipe arrai iged inside of said tubular-shaped member and surroundingsaid jet tube, the upper end of said air pipe being exposed to theatmos-' phere and the lower end of said air pipe projecting into thestarting reservoir and communicating with the mixing chamber.

. 13. A carbureter provided with a float chamber, a vertically disposedjet tube communicating with said float chamber and provided with aplurality of ports that, permit 1 lar-shaped member surrounding the airpipe to form a water chamber, and a removable device carried by saidtubular-shaped memher for clam ing the jet tube in position.

14. A cariiureter comprising a mixing chamber, means for vaporizing theliquid fuel and conducting it into said mixing chamber, a hinged orswinging air valve for admitting air into the mixing chamber, a swingingspring for holding said valve seated, and means whereby said spring canbe bodily shifted by a erson stationed some distance from the car ureterso as to vary the tension which said spring exerts on the openingmovement of the air valve.

15. A carbureter comprising a mixing chamber, means for vaporizingliquid fuel and conducting it into said mixing chamber, a swinging valvefor admitting air intothe mixing chamber, a sprin for holdin said valveseated, and means or bodily shifting said spring to vary the tensionwhich it exerts on the opening movement of said air valve.

16. A carbureter provided with a mixing chamber, an air .valve foradmitting air into the mixing chamber, a swinging member that rCflIllSsaiuair valve, a manually operable ropk arm, and a coiled springconnected to sald rock arm and to the member that can ries the air valvein such a mann'cvthat movement of said rock arm bodily shifts saidspring and thus varies the tension which it exerts on the openingmovement of the air valve.

17. A carburetor comprising a m'ming chamber, means for vaporizing fueland in troducing it into said mixing chamber, an air valve for admittingair into the mixing chamber, a swinging member carry mg said air valve,a spring for holdin said va 'e seated, and means for bodily shiftingsaid spring to vary the tension which it exerts on the air valve.

18. A carbureter provided with a mixing chamber, a valve for admittingair into said I chamber, a pivotally mounted arm carrying said valve, acoiled spring hav ng its lower end pivotally connected to said arm, andmeans for swingin the upper end of said spring to bodily shii t tensionwhich it exerts on the opening movement of the air valve.

19. A carburetor provided with a mixing chamber, means for mixing liquidfuel with air and conducting it into said mixing cham- 125 Y I her, anauxiliary air valve for admitting air into the mixing chamber, apivotally mounted arm carrying said valve, a manually opsame and thusvary the arable rock arm whme. free end is adapted i e to move towardand away frun the pivot of the valve-carrying arm, and a coiled spring Iconnected to the free end of said ruck arm and to the arm that carriesthe valve.

16 -into the mixing chamber, a hinged. arm that carries said valve, acoiled spring for holdmg said valve seated, means for shortening mlengthening said spring, and independent meflni for bodily shifting saidspring to vary the tension which it exerts on the opening 15 movement ofthe air valve.

In testimun hereof I hereunto :ifiix my signature in the pi'eeence oftwo witnesses, this twenty-seventh day of August 1908.

WILLIAM C. CARTER.

Witnesses "nnns L. CHURCH, GEORGE BAKEWELL.

